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If your job involves processing massive amounts of data you should familiarize yourself with Greenplum, MapReduce, and Hadoop. With 6.5 Petabytes of data eBay runs the world's largest data warehouse on Greenplum. Facebook runs a 2 PB warehouse on Hadoop. Impressive. Both Greenplum and Hadoop make use of the MapReduce framework pioneered by Google. You can run Hadoop on Amazon ...